To set config vars for a Heroku app, you do this:
$ heroku config:set GITHUB_USERNAME=joesmith How would I set a config var with the contents of a file?
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3 Answers
Take a look at the heroku-config plugin, which adds a heroku config:push command to push key-value pairs in a file named .env to the app.
It also has a heroku config:pull command to do the opposite and works very well with foreman for running the app locally with the config in .env.
https://github.com/xavdid/heroku-config
Example
heroku config:push --file=.env.production 
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Noname
How to do it to config vars of pipeline's review apps?
A simple pure-python solution using honcho and invoke:
from honcho.environ import parse from invoke import run def push_env(file='.env'): """Push .env key/value pairs to heroku""" with open(file, 'r') as f: env = parse(f.read()) cmd = 'heroku config:set ' + ' '.join( f'{key}={value}' for key, value in env.items()) run(cmd) The idea here is that you will get the same configuration as if you ran the project locally using honcho. Then I use invoke to run this task easily from the command line (using @task and c.run) but I've adapted it here to stand alone.
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I know this is too late but still it will be helpful for future users who land here.
I also wanted a quick solution to add variable to heroku app but copy-paste is so boring.. So wrote a script to read values from the .env file and set it at the requested app - all things passed as an option:
https://gist.github.com/md-farhan-memon/e90e30cc0d67d0a0cd7779d6adfe62d1
Usage
./bulk_add_heroku_config_variables.sh -f='/path/to/your/.environment/file' -s='bsc-server-name' -k='YOUR_CONFIG_KEY1 YOUR_CONFIG_KEY2' 